Extension-table lock.



No. 852,011. PATENTED APR. 30, 1907.

J. L. ARNOLD. EXTENSION TABLE LOCK.

APPLICATION FILED 0GT.18, 1906.

I L m A lwueu to:

3' MM/Z. 490mm JOHN ARNOLD, OF CANTON, OHIO.

- EXTENSION-TABLE LOCK.

Specification of Letters Patent.

Patented April 30, 1907.

Application filed October 19,1906. Serial No. 339,443.

To all whom it may concern..- 4

Beit'known that I, JoHN L. ARNOLD, a citizen of the United States, residing at Canton,'in the county of Stark and State of Ohio,

haveinvented anew and useful Extension- Table Look, of which the following is a specification.

The invention relates to a lock for a di- .vided-pedestal extension-table having a center leg within the pedestal parts when closed,

which cen'ter leg is usually made slightly shortei than the pedestal legs; and the object of the improvement is to provide a simple, economical and etficient lock which can be readily applied to any table of such general type, for engaging and drawing and holding together the pedestal parts when the table is closed.

This object is attained by the construction, mechanism and arrangement illustrated in the accompanying drawing, in which Figure 1 is a perspective view of the table showing the endsvextended; Fig, 2, a fragmentary-inside view of one pedestal part showing the lock applied thereto; Fi 3, a vertical-section of the pedestal parts locked together showing part of the top on the longitudinal middle line ofthe table, with the center leg broken away to disclose details of the lock; Fig. 4, a fragmentaryview of'the bailfinger. joint; Fig. 5, a detached perspective 4 1 throughout the drawings.

view of one finger showing its. pivot screw and the, connectingpart ofthe bail slightly sep aratedv therefrom Fig. 6 a detached. view of the crank shaft and supporting parts, showing the manner of adjusting the lock, and Fig. 7, a plan, view of a fragment of. the bridging with the crank shaft broken away, showingthe laterally elongated eyes.

Similar numerals refer; to similar parts The table which is -used toillustrate the lock comprises thetOp-halves Land 1* with the end slides 2 attached thereto, the centerleg 3 withthe cross bar 4 and the neutral slides 2 attached thereto, theintermediate slides 2? having thefordinary tongue 5 and groovefi connection with the endand neutral slides, and. the pedestal parts',7 and? with the pedestal legs 8 .attachedfthereto; the

same lieingattached to the top-halves on the under side of the end-lslides-by means of the ordinary bridging'or platesfa's 9.

Thelockin parts eomprlse the fingers 1 0, the bail'll, t e'operatingcrank 12, and the pins or posts as 13;: The fingers are pivoted thereof, asshown in Figs. 2 an 3,

raising rotates the fingers on their pivots and a preferably one on each inner side of the wall of one pedestal part 7, as by means of ;the

headed screws14, and the ends 15 of the fingers extend or protrude beyond the face of the pedestal walls andare preferably curved downward to form somewhat of a hook. The

ends 16 of the arms of the bail are pivoted to the other ends ofthe fingers, as by the rivet joint ,17, as shown in Fig. 4 and the arms of the bail preferably converge toward veach other and extend upward through the notch 18 in the inner edge of the bridging, so that the apex or comparatively short cross bar 19 of the bail is located a short distance above the bridging. The'arms of the bail are preferably held in position and guided by the eyes 20, which may be elon ated laterally of the table to accommodate the movements of the inclined arms of the bail,-asshown at 20 in Fig. 7.

The crank shaft 21 is longitudinally journaled on the bridging of the pedestal art 7 as by means of the eyes 22 and '23; ah may be held against endwise movement by the crank shoulder 24. on one side and the kinked shoulder 25 on the other side of the eyebearing 22. The outer end of the shaft is preferably bent at a right angle to form the handle 26, which is best adapted to normally hang directly downward, as shown in Fig. 1; and in this relation, the crank proper 1:2.is preferably horizontally positioned and extends under and in contact with the head or cross-bar of the bail at one side thereof, as shown in the same figure; which is the relation of-the parts when the lock is open or dise'ngagedand the )edestal parts are separatecL An inwar y projecting post or pin 13;is located on each inner side of the walls of the other pedestal part 7 in such a positionthat when the lock is open the fingers will clear and pass over and beyond the posts ;when'the pedestal parts are approximate] closed togetherg-whereupon the crank sha 't may be rotated and the bail raised by the crank operating'upward and along the underside of the cross-bar-to the op )ositc side which forces .theirfree ends downward and behind the posts on the opposite pedestal parts, and

,the pedestal )arts are thus drawn together as shownin ig. 3.

The parts are so proportioned and arranged that when the pedestal parts are drawn tightly together thecrank has been moved beyond the vertical or dead center to a point of rest against the opposite leg of the bail, as shown in Fig. 2, whereby the parts are automatically locked with the; table parts tightly closed. To disengage the lock and separate the table parts, the crank shaft is merely rotated in the reverse direction, which leaves the bail free to drop or to be drawn downward, which movement is. accomplished by the free ends of the fingers being lifted upward by the engaged posts as the pedestal partsare separated; whereupon the locking parts are in proper position for a reengagement.

The necessary adjustment of the parts of the lock to fit it for its work in the first place, or to take up the wear and tear of the points of contact, or to compensate for a shrinking or an expansion of the wood parts of the table, is very readily and simply accomplished by raising or lowering the outer bearing-eye 23, which is easily done as by means of its threaded. shank 27 extending through. the bridging and the nuts 28 above and below the same, which adjustment throws the opcrating crank downward or upward as may be necessar or desirable; and it will be noted that t 1e arms of the bail can be flexed toward each other or spread apart to clear the sides of the center leg and to fit and accommodate pedestal parts or" various widths and that the whole rock can be applied to any ordinary table of the type described without any important special preparation or construction of the same.

By the use of the substantially inverted V-shaped bail, which may be slightly truncated as described, and by applying the power at the apex of the same, it is evident that the arms of the bail are always in tension when the lock is operated and never per form their tunctions'under a compression or a torsional strain; for which reason the power of the operating crank is communicated di rectly in a substantially straight line, and therefore positively, to each of the locking fingers, which is very important in a locking mechanism of this character wherein any lost motion or elasticity in the transmission of the povveris very objectionable andrnay be fatal to the proper and cliicicnt operation of the lock.

What I claim as my invention, and desire to secure by Letters Patent, is-

' 1. A lock for a divided-pedestal extensiontable com )rising two postson the inner sides of the walis of one pedestal part, acrank journaled on the bridging of the other pedestal part, two fingers pivoted on the inner sides of the walls of the same pedestal part, and a bail with suitable guides having the ends of its arms pivoted to the inner ends of the fingers, and its cross-bar resting across the crank, the fingers being adapted to operate against the upper-inner sides of the posts:

plied to its apex, the fingers being adapted to operate against the posts to close the table when the pedestal parts are brought approximately together.

3. A look for a divided-pedestal extensiontable comprising two posts on one pedestal part, a crank journaled on the other pedestal part, two fingers pivoted on the same pedestal part, and a substantially inverted V- shaped bail pivoted to the fin ers and adapted to be operated by the cran applied to its apex, the fingers being adapted to operate against the posts to close the table when the pedestal parts are brought approximately together.

4. In a lock for a dividedpedestal exten- -sion-tahle, locking fingers pivoted on one pedestal part, an adjacent crank journaled on the same part, and a substantially inverted V-shaped bail-pivoted to the fingers and. having operative connection at its apexwith the crank, means for vertically ad ust' ing the operating end of the crank; and means on the other pedestal part adapted to co-operate with the fingers.

a. In a lock for a dividedpedestal extension table, locking fingers pivoted on one pedestal part, an adjacent crank journaled on the same part, and a substantially inverted V-shaped bail pivoted to the fingers and having operative connection at its apex with the crank; and means on the other pedes'tal part adapted to co-operate with the finers. b 6. In a lock for a divided-pedestal extension table, locking fingers pivoted on one pedestal part, an adjacent crank journaled on the same part, and an operative connection in a direct line between the crank and each of the fingers; and means on the other pedestal part adapted to co-operate with the fingers. j

7. In a lock for a divided-pedestal extension table, locking fingers'pivoted on one pedestal part, a flexible substantially inverted V-shaped bail connected with the fingers, and operating mechanism ap lied to the apex of the bail; and means on tiie other pedestal part adapted to co-operate with the fingers.

8. In a lock for a divided-pedestal extension table, locking fingers mountedon one pedestal part, a substantially'inverted V- shaped bail connected with the fingers and having a cross barat its apex, a crank mounted on the same part adapted to operate signed my name to this specifieation in the ggainst. thg inner xde of 3:116 c0s1'ls-br1lan%t0 presence of twosubscribing witnesses.

esto e aainstonesieote a'wen rotate Pbeyo ld the dead center; andmeans JOHN- ARNOLD 5 On the other pedestal part adapted to co-ope In presence 0f' s erate with the fingers. MARY CAVANAUGH In testimony whereof, I haw e hereunto HARRY FREASE. 

